Mailing system



FIG. 1, is a front, top and left side perspective view of a mailing system which incorporates the new design;

FIG. 2, is a front, top and right side perspective view thereof;

FIG. 3, is a front view thereof;

FIG. 4, is a top view thereof;

FIG. 5, is a right side view thereof;

FIG. 6, is a left side view thereof;

FIG. 7, is a rear view thereof; and,

FIG. 8, is a bottom view thereof. 

The ornamental design for a mailing system, as shown and described. 